Every number will have only 3 digits. In the ones place, there are 5 choices. For every choice of digit made in the ones place, there are 8 possible choices for the hundreds place (you can choose from 1-9, omitting whatever is used in the ones place), and there are 8 possible choices for the tens place (you can choose from 0-9, omitting whatever has already been used elsewhere).

So there are $7\cdot8\cdot8=320$ such numbers.

8 0

2 years ago

Find the non permissible replacement for y in this expression. y^2/ -3y+9

Lilit [14]

Answer:

Step-by-step explanation:

You have a fraction, so a non permited value is one which will create a 0 in the denominator.

-3y + 9 = 0

y = 3

3 0

2 years ago